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Free yourself from the tyranny of the cable
Take AKG's K 840 KL lightweight wireless headphones with you everywhere to enjoy your favorite music without the hassle of being tethered by a cord. They include a small wireless transmitter that simply plugs into the headphone jack of your iPod®, iPhone®, laptop or other music player, and streams high-quality sound to the headset's built-in receiver. The included elastic band and Velcro strip makes it easy to attach the transmitter to your music source. A handy volume control on the earcup lets you adjust listening levels to suit your taste without ever taking your iPod or iPhone out of your pocket.

Lose the cable  not the sound quality
The K 840 KLs use Kleer® wireless technology to deliver uncompressed stereo sound. Unlike other wireless technologies, Kleer delivers lossless, CD-quality digital audio, which means you won't be able to tell the difference between these headphones and your wired ones. Multi-receiver mode allows up to four people using Kleer AKG headphones to listen to the same audio source, so you can easily share music with your friends and family. With a range of more than 60 feet and a battery life of up to 28 hours, the K 840 KLs will go farther and play longer than most other portable wireless headphones. And just in case you need it, AKG includes a cable plus an airline adapter for a direct wired connection in situations where you'd rather just plug in, or when you want to make use of an in-flight entertainment system.

"Everything about the packaging and presentation of the AKG K 840 headphones are about travel. And they would be great to have on a trip. You could keep your iPod (or other portable player) in your pocket with the attached transmitter, and go for hours just listening through the wireless headphones. But I really found the AKG K 840 KL wireless headphones a plus in the office. Not only did I enjoy great sound, but being untethered from my computer and free to roam around... was the real benefit for me. "

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BEST BANG FOR THE BUCK

A GRAND SLAM.. EXCELLENT SOUND AND QUALITY.. VERY COMFORTABLE,AND LIGHTWEIGHT.. LIKE THE OLD SAYING GOES YOU GET WHAT YOU PAY FOR... AND THIS BABY IS WORTH EVERY PENNY... LADIES,AND GENTS YOU WONT GO WRONG... ***CRUTCHFIELD ROCKS***

Great to Have

Absolutely Wonderful !!! The sound clarity, range and definition are amazing. The fit is great, the ear cups are the perfect size, so you can wear these things for hours in total comfort. The transmitting range is 3X the stated 5 meters if you are in an open space. Last but not least, 55-60 hours on a full charge. There is NOTHING these wireless headphones lack.

Product Research

Features

Overview: The AKG K840 KL includes a headset with a
built-in wireless receiver and a wireless transmitter that plugs into your
source device, streaming your favorite music without the hassle of wires.

Transmitter: The included K840TX transmitter is shipped
paired with the headset; it can also be paired with up to three additional K840
KL headsets simultaneously. The transmitter has a 2-1/2" cable attached,
terminated with a 3.5mm mini-plug, used for signal input and charging.

Note: Kleer technology will not interfere
with wireless networks or other 2.4 GHz devices.

Charger: The AC adapter has a standard USB type-A output (5
volts/1 amp) and will charge the headset and transmitter at the same time using
the included cable. In addition to the US style plug, three adapters are
included for use in Europe, the UK, and Australia (the adapter accepts input of
100-240 volts at 50-60 Hz).

Bypass: When using wireless is not convenient, the 47"
bypass cable can be used to wire the headset to the source.

Comfortable Fit: The headset features
a lightweight design, leatherette padded ear-cups, and adjustable headband to
provide a comfortable fit.

On-Ear Controls: Volume up/down and mute controls are on the
left earcup (press volume up and volume down simultaneously to mute).

3D-Axis Folding Design: The headset
features a unique 3D-Axis folding mechanism for ease of handling, storing, and
transporting.

Auto Off: Whenever the transmitter is turned off, the headset
turns off automatically. When the headset is turned off, the transmitter will search
for it for three minutes, then turn off automatically. If no signal is available at
the transmitter input for 10 minutes, it will turn off automatically.

Group Mode: Up to four K840 KL headsets can be paired to one
transmitter simultaneously.

Rechargeable Battery: The headphones and transmitter are equipped
with integrated rechargeable batteries that can last up to 24 hours. An AC adapter is
included, or they can be recharged using a computer's USB port. The AC adapter charges
the battery in 1.5 hours.

Storage Case: The AKG K840 KL comes with a zippered carrying
case for the headphones, transmitter, AC adapter, and cables.

Specifications:

Wireless Frequency Range: 2.4 GHz-2.8 GHz

Transmission Power: <10 mW

Audio Frequency Range: 10.5 Hz-31 kHz

Impedance: 32Ω (when bypass cable is used)

Sensitivity: 120 dB (when bypass cable is used)

Maximum Input Power: 25 mW (when bypass cable is used)

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